13分之五乘以17分之八加13分之九乘以17分之五等于多少简便运算
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13分之五乘以17分之八加13分之九乘以17分之五等于多少简便运算
5/13×8/17+9/13×5/17
=5/13×8/17+5/13×9/17
=5/13×(8/17+9/17)
=5/13×1
=5/13
5/13×8/17+9/13×5/17
=5/13×8/17+5/13×9/17
=5/13×(8/17+9/17)
=5/13×1
=5/13
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5/13×8/17+9/13×5/17
=5/13×(8/17+9/17)
=5/13×17/17
=5/13×1
=5/13
=5/13×(8/17+9/17)
=5/13×17/17
=5/13×1
=5/13
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